1932, Sven Hedin Expedition 1 c.-10 c., cpl. set tied by cds. "PEIPING 7. 4. 33" to a registered envelope to Stockholm with adjacent red registration label, on reverse additional 1 c., 4 c. and 25c. tied by two further strikes, cover signed on the back flap by Sven Hedin himself and send to his sister Alma, very fine
